Spartanburg, South Carolina – Dangerous heat and the threat of afternoon thunderstorms could upend weekend plans in Spartanburg on Sunday, July 20th. Residents are urged to stay indoors during peak heat hours as the heat index climbs past 104°F by late afternoon.
According to the National Weather Service in Greenville-Spartanburg, there’s a 30% chance of thunderstorms beginning around 5 p.m. Sunday. These storms could bring localized heavy rain, gusty winds, and lightning. Temperatures will soar to 96°F, and light winds will offer little relief from the oppressive humidity. If you must be outdoors, drink water often and seek shade.
Roads like I-85 and Highway 29 may see brief travel delays during storm activity, particularly during the evening commute. Storms Sunday night could bring rainfall amounts near a tenth of an inch, though isolated downpours may exceed that. Monday brings more of the same: another 96°F high and a continued chance for storms after 2 p.m.
📆 5-Day Forecast for Spartanburg, SC (Starting Sunday, July 20):
- Sunday, July 20: High 96°F, chance of storms after 5 p.m., heat index 104°F
- Monday, July 21: High 96°F, storms likely after 2 p.m., light winds
- Tuesday, July 22: High 89°F, storms likely after 2 p.m., chance of showers overnight
- Wednesday, July 23: Mostly sunny, high near 89°F
- Thursday, July 24: High near 93°F, sunny and calm
- Friday, July 25: Sunny again, high approaching 96°F
Hot, humid, and unstable weather continues across Upstate South Carolina all week. Stay weather-aware — more alerts may follow.
